138.138.184.0/23

AS5972 · United States Department of Defense (DoD)

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Summary

Country	United States
Domain	mail.mil
ASN	AS5972
Registry	ARIN
ID	CERNERBLOCK

WHOIS Details

NetHandle:      NET-138-138-0-0-2
OrgID:          DNIC
Parent:         NET-138-138-0-0-1
NetName:        CERNERBLOCK
NetRange:       138.138.0.0 - 138.138.255.255
NetType:        reallocation
RegDate:        2025-08-28
Updated:        2025-08-28
Source:         ARIN


OrgID:          DNIC
OrgName:        DoD Network Information Center
CanAllocate:    
Street:         3990 E. Broad Street
City:           Columbus
State/Prov:     OH
Country:        US
PostalCode:     43218
RegDate:        1970-01-01
Updated:        2025-03-13
OrgAdminHandle: MIL-HSTMST-ARIN
OrgTechHandle:  MIL-HSTMST-ARIN
OrgTechHandle:  REGIS10-ARIN
OrgAbuseHandle: REGIS10-ARIN
Source:         ARIN


POCHandle:      MIL-HSTMST-ARIN
IsRole:         Y
LastName:       Network DoD
FirstName:      
Street:         DISA-Columbus
Street:         300 North James Road
City:           Whitehall
State/Prov:     OH
Country:        US
PostalCode:     43213
RegDate:        1993-05-26
Updated:        2026-02-12
OfficePhone:    +1-844-347-2457
Mailbox:        disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
Source:         ARIN


POCHandle:      REGIS10-ARIN
IsRole:         Y
LastName:       Registration
FirstName:      
Street:         DISA-Columbus
Street:         300 North James Road
City:           Whitehall
State/Prov:     OH
Country:        US
PostalCode:     43213
RegDate:        2009-06-24
Updated:        2026-02-12
OfficePhone:    +1-844-347-2457
Mailbox:        disa.columbus.ns.mbx.arin-registrations@mail.mil
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 138.138.0.0/16

No nearby ranges found.

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

405 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
138.138.184.127	AS5972 United States Department of Defense (DoD)	`3.31ms` from Honolulu, US
138.138.185.47	AS5972 United States Department of Defense (DoD)	`3.35ms` from Honolulu, US

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
20.8.149.151	AS8075 Microsoft Corporation	`0.23ms` from Amsterdam, NL
34.226.236.7	AS14618 Amazon.com, Inc.	`0.45ms` from Ashburn, US
54.218.235.231	AS16509 Amazon.com, Inc.	`0.18ms` from Boardman, US
207.148.132.71	AS852 TELUS Communications Inc.	`0.38ms` from Calgary, CA
119.187.11.151	AS4837 CHINA UNICOM China169 Backbone	`6.90ms` from Jinan, CN
6.2.127.23	AS668 United States Department of Defense (DoD)	`1.70ms` from Los Angeles, US
62.33.26.167	AS20485 Joint Stock Company TransTeleCom	`4.55ms` from Saint Petersburg, RU
52.8.224.39	AS16509 Amazon.com, Inc.	`0.13ms` from San Jose, US
140.207.41.215	AS17621 China Unicom Shanghai network	`2.22ms` from Shanghai, CN
138.2.78.55	AS31898 Oracle Corporation	`0.15ms` from Singapore, SG
219.74.66.39	AS9506 Singtel Fibre Broadband	`1.85ms` from Singapore, SG
100.55.81.87	AS14618 Amazon.com, Inc.	`0.48ms` from Ashburn, US
16.144.55.183	AS16509 Amazon.com, Inc.	`0.17ms` from Boardman, US
106.212.188.247	AS24560 Bharti Airtel Ltd., Telemedia Services	`6.23ms` from Delhi, IN
187.192.213.71	AS8151 UNINET	`6.95ms` from Guadalajara, MX
121.40.9.23	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`4.93ms` from Hangzhou, CN
182.209.25.167	AS17858 LG POWERCOMM	`3.48ms` from Incheon, KR
168.188.54.23	AS18298 Chungnam National University	`3.17ms` from Incheon, KR
112.162.241.183	AS4766 Korea Telecom	`6.15ms` from Incheon, KR
208.92.104.39	AS22408 West Ky Networks	`7.74ms` from Nashville, US
72.76.103.247	AS701 Verizon Business	`1.56ms` from New York City, US
52.47.122.247	AS16509 Amazon.com, Inc.	`0.14ms` from Paris, FR
201.123.177.247	AS8151 UNINET	`9.15ms` from Santiago de Queretaro, MX
24.107.44.103	AS20115 Charter Communications LLC	`4.03ms` from St. Louis, US
204.10.193.71	AS48925 VibeGAMES B.V.	`0.06ms` from Sydney, AU

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f4 -m7 138.138.184.67

traceroute to 138.138.184.67 (138.138.184.67): 7 hops max, 52 byte packets

4 [AS21928] 100.199.0.57 0.083 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Liuzhou, CN

On March 21st 2026

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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